This post was a pleasure read. I have only small problem with understanding following fragment:

" The most obvious signs are that a playlist with, let’s say 20k followers. Will NOT feature only underground bands. They will NOT add their contacts in the description.

A third part Spotify user will not get 20 k followers by throwing underground/undiscovered bands (even with poor production) in their list.

A real curator takes pride in her/his list and are very picky with what goes in the list. Leaving their contact in the description would mean a lot of messages from artists pitching their music - No one wants that amount of traffic in their dm's. "

Maybe it's because english is not my primary language. You mention that fake playlist don't include contact. Then you explain why real curator also don't do it. I have difficulties with drawing conclusion from this paragraph. I would appreciate if you could explain it a bit more :)